/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkUnstructuredGridSource.h,v $

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// .NAME vtkUnstructuredGridSource - abstract class whose subclasses generate unstructured grid data
// .SECTION Description
// vtkUnstructuredGridSource is an abstract class whose subclasses generate 
// unstructured grid data.

// .SECTION See Also
// vtkUnstructuredGridReader

#ifndef __vtkUnstructuredGridSource_h
#define __vtkUnstructuredGridSource_h

#include "vtkSource.h"

class vtkUnstructuredGrid;

class VTK_FILTERING_EXPORT vtkUnstructuredGridSource : public vtkSource
{
public:
  vtkTypeRevisionMacro(vtkUnstructuredGridSource,vtkSource);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Get the output of this source.
  vtkUnstructuredGrid *GetOutput();
  vtkUnstructuredGrid *GetOutput(int idx);
  void SetOutput(vtkUnstructuredGrid *output);
  
protected:
  vtkUnstructuredGridSource();
  ~vtkUnstructuredGridSource() {};
  
  // Since the Outputs[0] has the same UpdateExtent format
  // as the generic DataObject we can copy the UpdateExtent
  // as a default behavior.
  void ComputeInputUpdateExtents(vtkDataObject *output);
  
  virtual int FillOutputPortInformation(int, vtkInformation*);
private:
  vtkUnstructuredGridSource(const vtkUnstructuredGridSource&);  // Not implemented.
  void operator=(const vtkUnstructuredGridSource&);  // Not implemented.
};

#endif